About: http://webisa.webdatacommons.org/401201271

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The guide rail may be coated with a material such as a hydrogel, silicone, ePTFE or PTFE to increase its lubricity.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com